我正在使用VS2015.Trying使用System.Net.Http.Formatting给我一个错误说：
Severity Code Description Project File Line
Error CS0433 The type 'MultipartMemoryStreamProvider' exists in both 'System.Net.Http.Formatting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' and 'System.Net.Http.Formatting, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' aaAPIs C:\Working\Angular\aa\Controllers\Product\ImagesController.cs 22
我该如何解决这个问题？